Question

X(t)=t^3+1 Найти v(9), a(9)

Answer 1

$V=x'(t)=3t^2$

$V(9)=3*81=243$

$a=V'(t)=6t$

$a(9)=6*9=54$

Answer 2

$v(t)=x'(t)=(t^3+1)'=(t^3)'+(1)'=3t^2+0=3t^2;\ v(9)=3*9^2=3*9*9=243;\ a(t)=v'(t)=(3t^2);=3(t^2)'=3*2t=6t;\ a(9)=6*9=54$